Search Publications
X-Ray Study of the Outer Region of Abell 2142 with Suzaku
Hoshino, Akio; Sato, Kosuke; Ohashi, Takaya +4 more
We observed outer regions of a bright cluster of galaxies, A 2142, with Suzaku. Temperature and brightness structures were measured out to the virial radius (
X-Ray and Near-Infrared Observations of GX 339-4 in the Low/Hard State with Suzaku and IRSF
Nagata, Tetsuya; Yamaoka, Kazutaka; Ueda, Yoshihiro +10 more
X-ray and near-infrared (
X-Ray Spectrum of a Peculiar Supernova Remnant, G359.1-0.5
Yamaguchi, Hiroya; Koyama, Katsuji; Tsuru, Takeshi Go +3 more
We present Suzaku results of a supernova remnant (SNR), G 359.1-0.5, in the direction of the Galactic center region. From the SNR, we have found prominent K-shell lines of highly ionized Si and S ions, together with unusual structures at 2.5-3.0 and 3.1-3.6 keV. No canonical SNR plasma model, in either ionization equilibrium or under-ionization, c…
Discovery of a Cyclotron Resonance Feature in the X-Ray Spectrum of GX 304-1 with RXTE and Suzaku during Outbursts Detected by MAXI in 2010
Yamaoka, Kazutaka; Makishima, Kazuo; Mihara, Tatehiro +5 more
We report on the discovery of a cyclotron resonance scattering feature (CRSF) in the X-ray spectrum of GX 304
Suzaku Studies of Wide-Band Spectral Variability of the Bright Type I Seyfert Galaxy Markarian 509
Makishima, Kazuo; Nakazawa, Kazuhiro; Yamada, Shin'ya +3 more
The Type I Seyfert galaxy Markarian 509 was observed with Suzaku in 2010 November, for a gross time span of 2.2 days. The timing and spectral properties of the 0.5-45 keV X-rays, detected with the XIS and HXD, consistently revealed the presence of a soft spectral component that remained constant while the total X-ray intensity varied by
Soft and Hard X-Ray Emissions from the Anomalous X-Ray Pulsar 4U 0142+61 Observed with Suzaku
Enoto, Teruaki; Kokubun, Motohide; Makishima, Kazuo +4 more
The anomalous X-ray pulsar 4U 0142
Discovery of Gas Bulk Motion in the Galaxy Cluster Abell 2256 with Suzaku
Hayashida, Kiyoshi; Nagai, Masaaki; Tamura, Takayuki +1 more
The results from Suzaku observations of the galaxy cluster Abell 2256 are presented. This cluster is a prototypical and well-studied merging system, exhibiting substructures both in the X-ray surface brightness and in the radial velocity distribution of member galaxies. There are main and sub components separated by 3
Suzaku Metal Abundance Patterns in the Outflow Region of M 82 and the Importance of Charge Exchange
Gandhi, Poshak; Matsushita, Kyoko; Tamagawa, Toru +2 more
We performed spectral analysis of Suzaku data of the galactic disk and outflow regions of the starburst galaxy M 82. Thermal modeling of the central disk regions requires at least three temperature components. The Ly
Spectral Cross-Calibration of the Konus-Wind, the Suzaku/WAM, and the Swift/BAT Data Using Gamma-Ray Bursts
Yamaoka, Kazutaka; Ohno, Masanori; Onda, Kaori +20 more
We report on the spectral cross-calibration results of the Konus-Wind, the Suzaku/WAM, and the Swift/BAT instruments using simultaneously observed gamma-ray bursts (GRBs). This is the first attempt to use simultaneously observed GRBs as a spectral calibration source to understand systematic problems among the instruments. Based on these joint spec…
Suzaku View of the Supernova Remnant RCW 86: X-Ray Studies of Newly-Discovered Fe-Rich Ejecta
Yamaguchi, Hiroya; Koyama, Katsuji; Uchida, Hiroyuki
We report on results of imaging and spectral analysis of the supernova remnant (SNR) RCW 86 observed with Suzaku. The SNR is known to exhibit K-shell emission of low ionized Fe, possibly originating from supernova ejecta. We revealed the global distribution of the Fe-rich plasma in the entire remnant, for the first time; the Fe-K emission was clea…